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Last week the scientists warned that a third of the world's polar bears could disappear in the next 40 years.

上周，科学家们警告说，世界上三分之一的北极熊可能会在未来40年里消失。

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Both these scientists warned that the sea-level rise would adversely impact 35 per cent of the world's human population as they live in coastal regions.

这两位科学家都警告说，海平面上升将对世界35%的人口产生不利影响，因为他们生活在沿海地区。

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Dr.Nicholas says before he left the FDA, he and other scientists warned against the routine use of CT scans.

VOA: standard.2010.04.07

The Copenhagen meeting drew about , 2,000 scientists from around the world, and the news they delivered was not encouraging as they warned of an increasingly warmer world with more frequent droughts, and food and health problems.

VOA: standard.2009.03.12

In early December, Saddam Hussein had all Iraqi scientists warned of the serious consequences that they and their families would face if they revealed any sensitive information to the inspectors.

CNN: Transcript of Powell's U.N. presentation

The spawning stock of tuna is only 36% of its level 30 years ago, and ICCAT's scientists warned in September that the Mediterranean bluefin was on the brink of collapse.

ECONOMIST: High time to save the Mediterranean bluefin

Last year, a group of scientists warned that the proposed road across the park could bring the number of wildebeest in the park, estimated at about 1.3 million, down to 300, 000.

BBC: Serengeti road scrapped over wildlife concerns